@misc{indiciae9525c572fcf6,
  title = {Spin-spin interaction for very large atomic separations.},
  author = {Hirschfelder, J. O. and Meath, W. J. and Power, E. A.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660063750},
  note = {Source identifier: 19660063750}
}